Classroom Training


The fundamentals of plastic gears

The plastic gears are continuing to displace metal gears in a widening arena of applications. Their unique characteristics are also being enhanced with new developments, both in materials and processing. This training provides a vision into the fundamentals of plastic gear design and calculation, manufacturing, tolerancing, implementation and the basic skills to examine, and recognize common plastic gears failure modes.


The training provides participants with:

  • Understand the whole process of making a gear
  • Identify the theoretical and practical elements that are essential for producing quality gears and guarantee their service life Examine the different aspects of gear failures
  • Assess and interpret common gear failure modes of plastic gears.


3 July 2024


09:00 – 17:00 (GMT+8) Singapore



Pedagogical means:

Teaching method alternating theory and practice through case studies or works directed.

Who should attend:

Plastic gear designers, engineers and technicians in methods, control, quality and manufacturing departments. More generally all those (project managers, sales engineers and buyers) who want to know about plastic gears.


  • Basic concepts on the geometry of gears to “Teeth in involute”
    • Spur and helical gears
    • Meshing (contact ratio, interference, sliding)
    • Tooth modifications (profile and helix)
    • Contact pressure and tooth rupture calculations
  • Manufacture of plastic gears
  • Principles of tolerancing and control
  • Failure modes in plastic gears
    • Adhesive or “Normal” Wear
    • Abrasive
    • Pitting
    • Plastic Flow
    • Fracture
    • Thermal Cyclic Fatigue
  • Questions / answers.


This course will be conducted by Robert SHANDRO.


Principal Consultant - Engineering & Material Science specialized in Failure Analysis, Forensic Investigation and Mechanical Power Transmission components.
More than 30 years of consulting experience in industries including Aerospace, Energy, Transportation, Shipbuilding and Public Works.
Member of French delegation for ISO TC60 (Technical Committee), Expert in load capacity calculation, quality of materials and failure analysis for gears.
Member of IES (Institute of Engineers Singapore).

Areas of Expertise

  • Failure analysis of a wide range of mechanical equipment/components and structural facilities
  • Design, verification and failure analysis on mechanical power transmission components
  • Condition and remnant life assessment of mechanical power transmission components
  • Expert witness for litigation and insurance claims
  • Expert consultant and technical support on patent litigations
  • Standardization works (ISO TC60)



  • 5 years as Design Engineer (electric motors and generators)
  • 12 years as Technical Advisor (Judicial Expertise)
  • 13 years as Project Manager at CETIM
  • From year 2019 – Principal Consultant at MATCOR


  • Master of Engineering (MEng) UPT 1986
  • Master in Materials Science (MSc) ISMCM 1992

Course Name

MTS11: The Fundamentals of Plastic Gears

Course Date:

3 July 2024


09:00 – 17:00 (GMT +8) Singapore

Closing Date:

19 June 2024, Wednesday

Course Fee:

SGD 800.00 (exclude GST)

Early Bird:

Registration must reach us on or before 19 June 2024:
SGD 720.00 (exclude GST)

We welcome groups to attend our trainings. Please contact us for a group discount package.

Our Accounts will advise if GST is applicable. Participants shall bear all bank charges.
Learners must fulfill at least 75% attendance and pass all assessment components, to be awarded with a Certificate of Attendance (COA).

For clarification or inquiries please contact Mrs Lorraine HUANG or Joshua LEE at +65 67788285 or send an email to

Registration Form

To register for the course, please complete this form.

Payment Details:

  • Registration form and course fees are to reach MATCOR before the closing date.
  • Registration will only be confirmed upon full payment.
  • Direct internet banking payment to MATCOR Technology & Services Pte Ltd, Bank: Development Bank of Singapore, Bank Code: 7171, Branch Code: 032, Swift Code: DBSSSGSG, Bank Address: 1 Kim Seng Promenade, #02-32, Great World City, Singapore 237994, Account / Iban No: 032-004152-3. / PAYNOW: UEN199201190R
  • All cheques should be made payable to “MATCOR Technology & Services Pte Ltd” and mailed to 3 Seletar Aerospace Link Singapore 797550, Or
  • Overseas participants may choose to pay in EUR or USD.
  • Participants shall bear all bank charges for payments.

For clarification or inquiries please contact Mrs Lorraine HUANG or Joshua LEE at +65 67788285 or send an email to

Cancellation & Refund:

  • Any cancellation made after closing date – no refund, but delegate substitution is allowed.
  • Any cancellation made before closing date will receive full refund.
  • MATCOR reserves the right to cancel or reschedule the course, only if deemed necessary